[1] St Marianna Univ, Sch Med, Yokohama City Seibu Hosp, Dept Internal Med,Div Hematol, Yokohama, Kanagawa, Japan
[2] Kawasaki Municipal Tama Hosp, Dept Radiol, Kawasaki, Kanagawa, Japan
[3] St Marianna Univ, Sch Med, Yokohama City Seibu Hosp, Dept Pathol, Yokohama, Kanagawa, Japan
[4] St Marianna Univ, Sch Med, Dept Internal Med, Div Hematol & Oncol, Kawasaki, Kanagawa, Japan
[5] Tokyo Med & Dent Univ TMDU, Grad Sch Med & Dent Sci, Dept Hematol Therapeut, Tokyo, Japan